Adolf baeyee



UNITED STATES PATENT OFFICE.

ADOLF BAEYER, OF MUNICH, BA'VARIA, AND HEINRICH GARO, OF MANN- I HEIM, BADEN, GERMANY, ASSIGNORS TO THE BADISOHE ANILIN AND SODA FABRIK, OF MANNHEIM, BADEN, GERMANY.

DYEING FABRICS WITH ARTIFICIAL INDIGO-BLUE.

SPECIFICATION forming part of Letters Patent No. 2&O,360, dated April 19, 1881.

Application filed February 15, 1881. (Specimens) To all whom it may concern: ile fiber, yarn, or cloth may also be first pre- 50 Be it known that we, ADOLF BAEYER, a pared, printed,or impregnated with asolution subject of the King of Bavaria, and HEINRICH of xanthate of soda, and then be printed with (HBO, of Mannheim, a subject of the Grand a solution of an alkaline salt of orthonitro- 5 Duke of Baden, residing, respectively, at Muphenylpropiolic acid or the textile fiber, yarn,

nich, in the Kingdom of Bavaria,and at Mannor cloth may be first prepared, printed, or im- 55 heim, in the Grand Duchy of Baden, Empire preguated with the alkaline salt of orthonitroof Germany,-have invented new and useful Imphenylpropiolic acid, and then be printed with provements in Developing Blue Colors Withthe xanthate of soda.

in and Upon Textile Fibers and Fabrics from The above-described mixtures and solutions Artificial Indigo-Blue, of which the following can also be used as markinginks for marking 60 is a specification. textile fibers and fabrics.

This invention is based on the discovery that After printing or marking by any of the blue colors can be produced from orthonitroabove-described methods the blue color ber 5 phenylpropiolic acid within and upon textile comes developed within or upon the fiber, yarn,

fibers,yarn,or cloth. The said blue colors beor cloth by mere aging at a moderate tem 65 long to the class of so-called artificial indigo perature-say about to 50 centigrade. which is produced according to the specifica- Steaming or heating is not required. After tion in Letters Patent No. 227,470, dated May the color is fully developed the printed goods 20 11,1880, by the action of alkalies and deoxidare washed and finished in the usual manner.

izing agents upon orthonitrophenylpropiolic For dyeing purposes We prepare a cold aque- 7o acid. The said blue color is capable of replacous solution with about ten parts, by weight, ing vegetable indigo-blue or similar blues in of orthonitrophenylpropiolic acid, about four some of their industrial applications. parts, by weight, of carbonate of potash, and

Now, we have discovered that the deoxidaabout fifteen parts, by weight, of xanthate of tion of orthonitrophenylpropiolic acid mayalso soda, and with this solution we impregnate 7 be effected by the action of deoxidizing sulthe materials to be dyed in the usual way. For phur compounds belonging to the class of suldark shades a concentrated solution is to be pho-carbonates, and we have found that more employed, and for light shades the solution is 0 especially with the aid of alkaline'xanthates to be diluted accordingly. We then allow the good results areobtained; and our invention goods to age in the usual manner at a moder- 0 consists in the formation of blue colors belongate temperature-say about 20 to centiing to the class of artificial indigoblue withgradeuntil the blue color becomes developed in and upon a textile fiber, yarn, or cloth by the within or upon the fiber, yarn, or cloth. Sub- 3 5 means described in this specification. sequently the goods are washed and finished In carrying out this invention we proceed as in the usual way. 8 5 follows: Having employed the term orthonitro- For printing purposes we prepare a printingphenylpropiolic acid in this specification, we color suitable for calicoprinting by mixing wish it to be understood that we do not intend o aboutten parts, by weight,of orthonitrophenylto designate thereby a chemically pure subpropiolic acid and about four parts, by weight, stance bearingthatnameinscientificlanguage, 0 of carbonate of potash with about one hundred but we intend to designate therewith a manuparts, by weight, of starch-paste or any other factured commercial product. suitable thickening. We then add in the cold What we claim as new, and desire to secure 5 about fifteen parts, by weight, of xanthate of by Letters Patent, is-

soda and mix well. The color thus prepared l. The within-described process for develop- 5 is ready for use, and ought to be employed for ing blue colors or dyes belonging to the class printing without much delay, as upon standof artificial indigo blue in or upon a textile ing the coloris liable to decompose. The textfiber, yarn, or cloth, whether knit or woven,

by impregnating said fiber, yarn, or cloth with having the herein-described blue color devela solution ofa mixture of orthonitrophenylprooped within and upon the same.

piolic acid and alkali and a deoxidizing sul- In testimony whereof we have hereunto set phur compound belonging to the class of sulour hands in the presence of two subscribing 5 pho-carbonates, such as Xanthates of soda, and witnesses.

then submitting the fiber, yarn, or cloth to a ADOLF BAEYER. 3 drying or aging process, substantially as set' HEINRICH OARO. forth. Witnesses:

2. As a new article of manufacture, textile PAUL FRIEDLAENDER,

1o fibers, yarn, or cloth, whether knit or woven, WILHELM HAUSSMANN. 

